A/D converter with noise elimination function
AssigneesMitsubishi Denki Kabushiki Kaisha, Mitsubishi Electric System LSI Design Corporation
InventorsTeruyuki Kogo, Kenji Kubo
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Abstract
An A/D converter includes a noise detector for generating a noise detection signal when it detects noise in an A/D conversion reference voltage; an A/D operation controller for generating a bit-shift signal in response to the noise detection signal; and an A/D conversion module for discarding an A/D conversion resultant bit affected by noise in response to the bit-shift signal, for holding the remaining A/D conversion resultant bits, and for restarting the A/D conversion from the discarded A/D conversion resultant bit after the noise becomes negligible. The A/D converter can obtain reliable A/D conversion data against the noise in the A/D conversion reference voltage without increasing the circuit scale so much.
Claims8
An A/D converter comprising:
- a detector for generating a detection signal when it detects a specified property of a detector input signal;
- an A/D operation controller for generating a bit-shift signal in response to the detection signal fed from said detector;
- and
- an A/D conversion module for carrying out A/D conversion with reference to an A/D conversion reference voltage, for discarding an A/D conversion resultant bit affected by noise in response to the bit-shift signal fed from said A/D operation controller, for holding remaining A/D conversion resultant bits, and for restarting the A/D conversion from the discarded A/D conversion resultant bit after the noise becomes negligible.
An A/D converter comprising:
- a detector for generating a detection signal when it detects a specified property of a detector input signal;
- an A/D conversion module for generating A/D conversion resultant data by carrying out A/D conversion of an analog input signal with reference to an A/D conversion reference voltage;
- and
- an A/D operation controller for deciding an A/D conversion resultant bit affected by noise in response to the detection signal fed from said detector and to the A/D conversion resultant data fed from said A/D conversion module, and for outputting reliability information together with the A/D conversion resultant data.
Dependencies are inferred from the claim text.